Pistachio nut opener



FIG. 1 shows a perspective view of my design for a pistachio nut opener;

FIG. 2 shows a top view thereof, with the bottom view being identical;

FIG. 3 shows a side view thereof, with the opposite side view being a mirror image thereof; and,

FIG. 4 shows a front view thereof.

The areas in dotted lines show environmental structure only and form no part of the invention. 

The ornamental design for a pistachio nut opener, as shown and described. 